{"id":1391,"date":"2016-05-23T10:52:44","date_gmt":"2016-05-23T09:52:44","guid":{"rendered":"http:\/\/www.michaelm.info\/blog\/?p=1391"},"modified":"2016-05-23T10:52:44","modified_gmt":"2016-05-23T09:52:44","slug":"old-hp-p400-raid-performance-comparison","status":"publish","type":"post","link":"http:\/\/www.michaelm.info\/blog\/?p=1391","title":{"rendered":"Old HP p400 RAID performance comparison"},"content":{"rendered":"<p>I was doing a clear out of some paper work and came across these write performance tests which I did a few years back on an HP DL380 G5 with a p400 RAID controller.<\/p>\n<ul>\n<li>4 drive RAID10 = 144MB\/s (~72MB\/s per drive)<\/li>\n<li>4 drive RAID0 = 293MB\/s (~73MB\/s per drive)<\/li>\n<li>8 drive RAID0 = 518MB\/s (~64MB\/s per drive)<\/li>\n<li>8 drive RAID5 = 266MB\/s (~38MB\/s per drive)<\/li>\n<li>8 drive RAID6 = 165MB\/s (~28MB\/s per drive)<\/li>\n<li>8 drive RAID10 = 289MB\/s (~72MB\/s per drive)<\/li>\n<\/ul>\n<p>The &#8220;per drive&#8221; is data being written per active data drive, excluding any RAID overheads.<\/p>\n<p>I inferred from the above that the p400 RAID controller maxes out at around 518MB\/s as it is unable to saturate 8 drives in a RAID0 array (64MB\/s vs 72MB\/s per drive). Not sure if this is a controller throughput or PCIe bus limitation.<\/p>\n<p>Eitherway, this testing was (I think) done on Ubuntu 10.x or 12.x with pretty bog standard settings using a simple command such as:<\/p>\n<pre>dd if=\/dev\/zero of=\/dev\/cciss\/c0d0 bs=1024k<\/pre>\n<p>I thought I&#8217;d capture these figures here since I have no where else to save them.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I was doing a clear out of some paper work and came across these write performance tests which I did a few years back on an HP DL380 G5 with a p400 RAID controller. 4 drive RAID10 = 144MB\/s (~72MB\/s per drive) 4 drive RAID0 = 293MB\/s (~73MB\/s per drive) 8 drive RAID0 = 518MB\/s [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[47,60,227],"class_list":["post-1391","post","type-post","status-publish","format-standard","hentry","category-technical","tag-hp","tag-linux","tag-performance"],"_links":{"self":[{"href":"http:\/\/www.michaelm.info\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1391","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.michaelm.info\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.michaelm.info\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.michaelm.info\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.michaelm.info\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1391"}],"version-history":[{"count":1,"href":"http:\/\/www.michaelm.info\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1391\/revisions"}],"predecessor-version":[{"id":1392,"href":"http:\/\/www.michaelm.info\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1391\/revisions\/1392"}],"wp:attachment":[{"href":"http:\/\/www.michaelm.info\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1391"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.michaelm.info\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1391"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.michaelm.info\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1391"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}